UCD3138RMHT datasheet(36/78 Pages) TI1

Nome de Peças	UCD3138RMHT

Descrição Electrónicos	Highly Integrated Digital Controller for Isolated Power

PDF	78 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI1 [Texas Instruments]

Página de início	http://www.ti.com

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36 / 78 page

UCD3138

SLUSAP2F – MARCH 2012 – REVISED NOVEMBER 2013

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Event 2 and Event 4 are not relevant in Multi mode.

DPWMB can cross over the period boundary safely, and still have the proper pulse width, so full 100%

pulse width operation is possible. DPWMA cannot cross over the period boundary.

Since the rising edge on DPWM B is also fixed, Blanking B-Begin and Blanking B-End can be used for

blanking this rising edge.

And, of course, Cycle Adjust B is usable on DPWM B.

4.8

DPWM Resonant Mode

This mode provides a symmetrical waveform where DPWMA and DPWMB have the same pulse width. As

the switching frequency changes, the dead times between the pulses remain the same.

The equations for this mode are designed for a smooth transition from PWM mode to resonant mode, as

described in the LLC Example section. Here is a diagram of this mode:

Functional Overview

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UCD3138RMHT Folha de dados(PDF) 36 Page - Texas Instruments